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(11) | EP 1 672 459 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Method of controlling pH of electrolyzed solution using microfluidic device including electrolysis device |
| (57) Provided is a method of controlling the pH of a solution using electrolysis in a
microfluidic device comprising an electrolysis device including an anode chamber (20),
a cathode chamber (30), and a partition membrane between the anode chamber and the
cathode chamber, wherein the anode chamber includes an inlet and an outlet through
which an anode chamber solution enters and is discharged from the anode chamber, respectively,
and an electrode (10), and the cathode chamber includes an inlet and an outlet through
which a cathode chamber solution enters and is discharged from the cathode chamber,
respectively, and an electrode (10). The method includes: flowing the anode chamber
solution containing a compound having a lower standard oxidation potential than water
into the anode chamber through the inlet of the anode chamber; flowing the cathode
chamber solution containing a compound having a lower standard reduction potential
than water into the cathode chamber through the inlet of the cathode chamber; applying
voltage between the electrode in the anode chamber and the electrode in the cathode
chamber to induce electrolysis in the anode chamber and the cathode chamber; and mixing
equal volumes of the acidic anode-electrolyzed solution and the basic cathode-electrolyzed
solution, wherein the volumes of the cathode chamber and the anode chamber are controlled
in a predetermined ratio according to a target pH of a solution obtained by mixing
the acidic anode-electrolyzed solution and the basic cathode-electrolyzed solution.
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